Some of the chips supported by this driver have 13 bit or 16 bit fan countregisters. This patch improves support for those registers, specifically forNCT6775F. With the changes in this patch, fan speed is reported correctly evenif the fan divider is set to a low value, which results in a fan speed readingabove 0xff.

With this patch, the width of fan count registers is no longer used to determineif the chip has fan divider register(s) or not. A dedicated flag is used insteadto determine if this is the case.